AArch64: Refactor costs models to different files.

AArch64: Refactor costs models to different files.

This patch series attempts to move the generic cost model in AArch64 to a new
and modern generic standard.  The current standard is quite old and generates
very suboptimal code out of the box for user of GCC.

The goal is for the new cost model to be beneficial on newer/current Arm
Microarchitectures while not being too negative for older ones.

It does not change any core specific optimization.  The final changes reflect
both performance optimizations and size optimizations.

This first patch just re-organizes the cost structures to their own files.
The AArch64.cc file has gotten very big and it's hard to follow.

No functional changes are expected from this change.  Note that since all the
structures have private visibility I've put them in header files instead.

gcc/ChangeLog:

	PR target/111370
	* config/aarch64/aarch64.cc (generic_addrcost_table,
	exynosm1_addrcost_table,
	xgene1_addrcost_table,
	thunderx2t99_addrcost_table,
	thunderx3t110_addrcost_table,
	tsv110_addrcost_table,
	qdf24xx_addrcost_table,
	a64fx_addrcost_table,
	neoversev1_addrcost_table,
	neoversen2_addrcost_table,
	neoversev2_addrcost_table,
	generic_regmove_cost,
	cortexa57_regmove_cost,
	cortexa53_regmove_cost,
	exynosm1_regmove_cost,
	thunderx_regmove_cost,
	xgene1_regmove_cost,
	qdf24xx_regmove_cost,
	thunderx2t99_regmove_cost,
	thunderx3t110_regmove_cost,
	tsv110_regmove_cost,
	a64fx_regmove_cost,
	neoversen2_regmove_cost,
	neoversev1_regmove_cost,
	neoversev2_regmove_cost,
	generic_vector_cost,
	a64fx_vector_cost,
	qdf24xx_vector_cost,
	thunderx_vector_cost,
	tsv110_vector_cost,
	cortexa57_vector_cost,
	exynosm1_vector_cost,
	xgene1_vector_cost,
	thunderx2t99_vector_cost,
	thunderx3t110_vector_cost,
	ampere1_vector_cost,
	generic_branch_cost,
	generic_tunings,
	cortexa35_tunings,
	cortexa53_tunings,
	cortexa57_tunings,
	cortexa72_tunings,
	cortexa73_tunings,
	exynosm1_tunings,
	thunderxt88_tunings,
	thunderx_tunings,
	tsv110_tunings,
	xgene1_tunings,
	emag_tunings,
	qdf24xx_tunings,
	saphira_tunings,
	thunderx2t99_tunings,
	thunderx3t110_tunings,
	neoversen1_tunings,
	ampere1_tunings,
	ampere1a_tunings,
	neoversev1_vector_cost,
	neoversev1_tunings,
	neoverse512tvb_vector_cost,
	neoverse512tvb_tunings,
	neoversen2_vector_cost,
	neoversen2_tunings,
	neoversev2_vector_cost,
	neoversev2_tunings
	a64fx_tunings): Split into own files.
	* config/aarch64/tuning_models/a64fx.h: New file.
	* config/aarch64/tuning_models/ampere1.h: New file.
	* config/aarch64/tuning_models/ampere1a.h: New file.
	* config/aarch64/tuning_models/cortexa35.h: New file.
	* config/aarch64/tuning_models/cortexa53.h: New file.
	* config/aarch64/tuning_models/cortexa57.h: New file.
	* config/aarch64/tuning_models/cortexa72.h: New file.
	* config/aarch64/tuning_models/cortexa73.h: New file.
	* config/aarch64/tuning_models/emag.h: New file.
	* config/aarch64/tuning_models/exynosm1.h: New file.
	* config/aarch64/tuning_models/generic.h: New file.
	* config/aarch64/tuning_models/neoverse512tvb.h: New file.
	* config/aarch64/tuning_models/neoversen1.h: New file.
	* config/aarch64/tuning_models/neoversen2.h: New file.
	* config/aarch64/tuning_models/neoversev1.h: New file.
	* config/aarch64/tuning_models/neoversev2.h: New file.
	* config/aarch64/tuning_models/qdf24xx.h: New file.
	* config/aarch64/tuning_models/saphira.h: New file.
	* config/aarch64/tuning_models/thunderx.h: New file.
	* config/aarch64/tuning_models/thunderx2t99.h: New file.
	* config/aarch64/tuning_models/thunderx3t110.h: New file.
	* config/aarch64/tuning_models/thunderxt88.h: New file.
	* config/aarch64/tuning_models/tsv110.h: New file.
	* config/aarch64/tuning_models/xgene1.h: New file.